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The Simpson T20ABNB is a heavy-duty 8-gauge box nail with a4\” length and an annular ring shank for exceptional holding power. Made from 316 stainless steel, this nail is built to withstand the harshest environments – including coastal, marine, and chemically treated wood applications. The ring shank design delivers superior withdrawal resistance, making this nail ideal for structural framing, decking, fencing, and other critical exterior wood-to-wood connections where long-term strength and corrosion resistance are essential. Key Features: 8 gauge x 4\” length for heavy-duty fastening Annular ring shank for maximum grip and withdrawal resistance Made from 316 stainless steel for top-tier corrosion protection Excellent for marine, coastal, and treated wood applications Ideal for framing, decking, fencing, and structural wood connections California Residents: WARNING